文献类型：期刊文献

中文题名：CE–5 号高钛模拟月壤固体试件单轴受压本构模型

英文题名：Constitutive model of CE–5 simulated lunar soil solid specimens under uniaxial compression

作者：Xu, Guihong Tang, Hong Pang, Ronghua Ren, Xu Duan, Li

第一作者：徐桂弘

机构：[1] School of Civil Engineering, Guizhou Institute of Technology, Guizhou, Guiyang, 550001, China; [2] Institute of Geochemistry, Chinese Academy of Sciences, Guizhou, Guiyang, 550001, China

第一机构：贵州理工学院土木工程学院

年份：2024

卷号：43

期号：11

起止页码：2823-2831

外文期刊名：Yanshilixue Yu Gongcheng Xuebao/Chinese Journal of Rock Mechanics and Engineering

收录：EI(收录号：20245117552451)

语种：中文

外文关键词：Compressive strength - Hydraulic servomechanisms - Residual stresses - Soil cement - Stress-strain curves

摘要：Using CE–5(Change–5) simulated lunar soil as the main material，three types of experimental samples(YR–1，YR–2，YR–3) were made by adding inorganic curing agents. A universal servo hydraulic press (100 kN) was used to apply vertical loads，and stress-strain curves were obtained. The internal morphology and micro cavity characteristics of the samples were observed using scanning electron microscopy. The failure morphology，deformation performance，and elastic modulus of the solidified lunar soil samples were studied. The uniaxial compressive constitutive model of CE–5 simulated lunar soil solid samples was obtained through segmented analysis. The conclusion is as follows：(1) The compressive strength is related to the water cement ratio and the amount of cementitious materials used. As the water cement ratio decreases，the compressive strength increases，and as the amount of curing agent increases. (2) There are generally many micro voids and small cracks inside the solidified sample. When the external pressure reaches the ultimate strength，the micro voids and micro cracks expand and penetrate，leading to the failure of the sample. (3) The experimental results of stress-strain curves were fitted using cubic polynomials and rational fractions to obtain the rising and falling sections of the stress-strain curves of lunar solidified soil. A segmented constitutive model for lunar solidified soil specimens was proposed，and the calculated results of the model were in good agreement with the experimental curves，providing a theoretical basis for the technical analysis of lunar soil engineering. ? 2024 Academia Sinica. All rights reserved.